High severity7.5GHSA Advisory· Published May 7, 2026· Updated May 7, 2026
CVE-2026-41643
CVE-2026-41643
Description
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/osrg/gobgp/v4Go | < 4.3.0 | 4.3.0 |
Affected products
2Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/osrg/gobgp/releases/tag/v4.3.0nvdPatchRelease NotesWEB
- github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2qnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-8rxh-r2p6-7f2qghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-41643ghsaADVISORY
News mentions
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